I am running the B2 muffler delete, which is essentially what you see above but a bent pipe and has the flanges on the ends. I kept the resonators and the truck sounds amazing. I got the delete thinking it would be too loud and was probably going to get the mid-volume version, knew it would be interchangeable, but kept the delete. When on the throttle, it sounds like an old school muscle car, but on the highway it isn't loud. You can hear it, but it does not drone like a chamber muffler. It has been about a year and is holding up great.
My buddy is running a chamber Flowmaster on his F150 V8, it is stupid loud inside the cab and drives me nuts.